P0628 2015 GMC Sierra Code - Fuel Pump Speed Output Circuit Low Voltage
Quick Answer
The P0628 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Fuel Pump Speed Output Circuit Low Voltage. Common causes include Faulty fuel pump speed sensor, Damaged wiring or connectors in the fuel pump speed output circuit, Malfunctioning PCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0628 2015 GMC Sierra indicates Fuel Pump Speed Output Circuit Low Voltage.
- Common causes
- Common causes include Faulty fuel pump speed sensor, Damaged wiring or connectors in the fuel pump speed output circuit, Malfunctioning PCM.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0628 2015 GMC Sierra Description
The P0628 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Fuel Pump Speed Output Circuit Low Voltage. This code is triggered when the powertrain control module (PCM) detects that the voltage signal from the fuel pump speed output circuit is lower than the specified range. The fuel pump speed output circuit is responsible for controlling the fuel pump's speed, ensuring that the correct amount of fuel is delivered to the engine at all times.
Common Causes of P0628 2015 GMC Sierra
- Faulty fuel pump speed sensor.
- Damaged wiring or connectors in the fuel pump speed output circuit.
- Malfunctioning PCM.
- Defective fuel pump.
- Electrical issues such as a blown fuse or relay in the fuel pump circuit.
Symptoms of P0628 2015 GMC Sierra
- Engine misfires or hesitation during acceleration.
- Reduced fuel efficiency.
- Engine stalling or difficulty starting.
- Illumination of the check engine light.
- Rough idling or uneven engine performance.
How to Fix P0628 2015 GMC Sierra
- Begin by conducting a thorough inspection of the fuel pump speed output circuit, checking for any visible damage to wiring or connectors.
- Test the fuel pump speed sensor to determine if it is functioning properly.
- Use a multimeter to check the voltage signal in the fuel pump speed output circuit.
- If necessary, replace the fuel pump speed sensor, repair any damaged wiring or connectors, or replace the fuel pump itself.
- Clear the DTC with a scan tool and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0628 2015 GMC Sierra
The typical repair costs for addressing a P0628 code on a 2015 GMC Sierra can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.
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